/* Copyright  2009
   @Author
   Richard Changde Yin            e-mail yinchangde@hotmail.com

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; version 2 of the License.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */
   
/**
 * @filename: item/ref_null_helpder.cc
 */ 

#include <server_includes.h>
#include CSTDINT_H
#include <item/ref.h>
#include <item/ref_null_helper.h>
#include <item/subselect.h>

double Item_ref_null_helper::val_real()
{
  assert(fixed == 1);
  double tmp                  = (*ref)->val_result();
  owner->was_null|= null_value= (*ref)->null_value  ;
  return tmp;
}


int64_t Item_ref_null_helper::val_int()
{
  assert(fixed == 1);
  int64_t tmp              = (*ref)->val_int_result()      ;
  owner->was_null         |= null_value= (*ref)->null_value;
  return tmp;
}


my_decimal *Item_ref_null_helper::val_decimal(my_decimal *decimal_value)
{
  assert(fixed == 1);
  my_decimal *val= (*ref)->val_decimal_result(decimal_value);
  owner->was_null          |= null_value= (*ref)->null_value;
  return val;
}

bool Item_ref_null_helper::val_bool()
{
  assert(fixed == 1);
  bool val= (*ref)->val_bool_result();
  owner->was_null|= null_value= (*ref)->null_value;
  return val;
}


String* Item_ref_null_helper::val_str(String* s)
{
  assert(fixed == 1);
  String* tmp= (*ref)->str_result(s);
  owner->was_null|= null_value= (*ref)->null_value;
  return tmp;
}

bool Item_ref_null_helper::get_date(COLLAPSAR_TIME *ltime,uint32_t fuzzydate)
{
  return (owner->was_null|= null_value= (*ref)->get_date(ltime, fuzzydate));
}

void Item_ref_null_helper::print(String *str, enum_query_type query_type)
{
  str->append(STRING_WITH_LEN("<ref_null_helper>("));
  if (ref)
    (*ref)->print(str, query_type);
  else
    str->append('?');
  str->append(')');
}


